The Adrenocorticotropic hormone (ACTH) Stimulation test is a test usually ordered and examined by endocrinologists to assess the functioning of the adrenal glands and their response by measuring how well the adrenal glands respond to the adrenocorticotropic hormone. Adrenocorticotropic hormone is a hormone produced in the anterior pituitary gland of the body. It regulates the number of steroids produced by adrenals of the body.The test is performed on a sample of blood to measure the levels of aldosterone in blood. This test can be ordered if a person has symptoms of weakness or tiredness, temporary paralysis, high or low blood pressure and etc.